On-again, off-again couple supermodel Hilary Rhoda and former Ranger Sean Avery have broken up again, this time for good. They split after two years last fall, but reunited earlier this year. But sources tell us famously hotheaded Avery “struggled with retiring from hockey, especially while his former team was doing so well,” reaching the Eastern Conference finals. Sources say Rhoda, who looked stunning this week at Veuve Clicquot Polo and the CFDA Awards, broke up with him. A rep for Rhoda had no comment and Avery’s rep told us that beyond his new job at ad agency Lipman-NYC, “He’s keeping his private life private these days.”